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Journal of Forestry Research 2016年第4期27卷 773-778页

作者： S.D.Dayamba P.Savadogo S.diawara L.Sawadogo World Agroforestry Centre (ICRAF) West and Central Africa Regional Office - Sahel Node World Agroforestry Centre & International Crop Research Institute for the Semi-Arid Tropics (ICRAF-ICRISAT) West and Central Africa Region-Sahel Node De'partement Productions Forestie`res Centre National de la Recherche Scientifique et Technologique Institut de l’Environnement et de Recherches Agricoles

Insufficient knowledge of the germination ecology of local species is one of the main constraints to restoration of degraded rural lands. We tested seeds from fourteen Sudanian savanna species targeted for restoration for their response to two different pretreatments（conventional and prolonged acid pretreatments） and two different storage conditions（ambient room conditions and refrigerator at 4 C）. For 6 of the studied species, longer soaking in sulphuric acid significantly improved germination rates and also reduced the germination time of some species. Storage condition, in general did not affect germination rates except for two species where cool storage depressed germination. The practical implication is that, for the species tested, when mature seeds are collected for plantation in the upcoming rainy season, there is no need to invest in infrastructure and energy for storing in cold *** study also revealed that in general when seeds are stored in ambient conditions from the time of collection up to seeding time, although germination rate does not increase, germination time is shortened and this could be of great interest in synchronizing germination in real field conditions.

关键词： germination restoration plantation ambient mature stored ecology degraded shortened longer

Impairment of Continuous Insulin Delivery Therapy and Analysis from Graeco-Latin Square Design Model

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Journal of Biosciences and Medicines 2016年第8期4卷 40-51页

作者： Norou diawara Ayodeji Demuren Eric Gyuricsko Department of Mathematics and Statistics Old Dominion University Norfolk VA USA Department of Mechanical and Aerospace Engineering Old Dominion University Norfolk VA USA Department of Pediatrics Eastern Virginia Medical School Norfolk VA USA

The desire to deliver measured amount of insulin continuously to patients with type I diabetes, for glycemic control, has attracted a lot of attention. Continuous subcutaneous insulin infusion has seen some success in recent years. However, occlusion of insulin delivery may prevent the patient from receiving the prescribed dosage, with adverse consequence. An in vitro study of insulin delivery is performed, using different insulin pumps, insulin analogs and operating conditions. The aim is to identify incidences of occlusion due to bubble formation in the infusion line. A detailed statistical analysis was performed on the data collected to determine any significant differences and deviations in insulin delivery rates that might be due to factors such as: pump type, the set basal flow rate, insulin type, vibration, and possible insulin occlusion due to air bubble formation within the infusion line. Our findings from the Graeco-Latin Square design model show that there are statistical differences due to the devices, and statistical identifiable clusters are used to distinguish the devices. Such hierarchical models used to describe the analyses, include the flow rate, the pump types, and the activity level.

关键词： Graeco-Latin Square Design Insulin Delivery Model Based Cluster Analysis Occlusion

Prognostic Factors of Mortality in Post-Myocardial Infarction Patients: A 24-Hour Rhythmic Holter Observational Study

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World Journal of Cardiovascular Diseases 2023年第4期13卷 214-219页

作者： Franck Ekoba Othende Fatima Rebbouh Ousmane diawara Cardiology and Vascular Diseases Department CHU MOHAMED VI Marrakech Morocco

Background: Heart dysfunction and sudden death are common complications in post-myocardial infarction. Purpose: This study aims to contribute to improving patient’s management by determining the factors correlated to the occurrence of left ventricular dysfunction or post-infarction sudden death. Method: It was a transversal, descriptive and analytical study conducted from January to October 2021. Results: The variables studied covered epidemiological, therapeutic and electrocardiographic aspects. There were 102 patients admitted for a recent revascularized myocardial infarction or not who had received a 24-hour ECG Holter after the acute phase of coronary event. The study population was predominantly men 88% versus 12% women with a sex ratio of 0.15. The discharge prescription was 74% antiarrhythmic, 91% platelet antiaggregator and 14% anticoagulant. Electrical abnormalities consisted of supraventricular extrasystoles in 45% of cases, ventricular extrasystoles in 61%, atrial fibrillation in 19% and supraventricular tachycardias in 11% (p Conclusion: The prognostic factors associated with the onset of post-infarction complications were ventricular arrhythmias (p .

关键词： Myocardial Infarction Supraventricular Extrasystole (SVES) Ventricular Tachycardia (VT) Myocardial Infarction (MI)—Morocco

Effect of Planting Date on Yield and Yield Components of Grain Sorghum Hybrids

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American Journal of Plant Sciences 2024年第5期15卷 387-402页

作者： Bandiougou diawara Sory Diallo Brahima Traore Scott Staggenbord Vara Prasad Institut D’ Economie Rurale (IER) Bamako Mali Manhattan KS USA

In Kansas, productivity of grain sorghum [Sorghum bicolor (L.) Moench] is affected by weather conditions at planting and during pollination. Planting date management and selection of hybrid maturity group can help to avoid severe environmental stresses during these sensitive stages. The hypothesis of the study was that late May planting improves grain sorghum yield and yield components compared with late June planting. The objectives of this research were to investigate the influence of planting dates yield and yield components of different grain sorghum hybrids, and to determine the optimal planting date and hybrid combination for maximum biomass and grains production. Three sorghum hybrids (early, medium, and late maturing) were planted in late May and late June without irrigation in Kansas at Manhattan/Ashland Bottom Research Station, and Hutchinson in 2010;and at Manhattan/North Farm and Hutchinson in 2011. Data on dry matter production, yield and yield components were collected. Grain yield and yield components were influenced by planting date depending on environmental conditions. At Manhattan (2010), greater grain yield, number of heads per plant, were obtained with late-June planting compared with late May planting, while at Hutchinson (2010) greater yield was obtained with late May planting for all hybrids. The yield component most affected at Hutchinson was the number of kernels∙panicle−1 and plant density. Late-May planting was favorable for late maturing hybrid (P84G62) in all locations. However, the yield of early maturing hybrid (DKS 28-05) and medium maturing hybrid (DKS 37-07) was less affected by delayed planting. The effects of planting dates on yield and yield components of grain sorghum hybrids were found to be variable among hybrid maturity groups and locations.

关键词： Sorghum [Sorghum bicolor (L.) Moench] Grain Yield Yield Components

The Use of Item Response Theory in Survey Methodology: Application in Seat Belt Data

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American Journal of Operations Research 2018年第1期8卷 17-32页

作者： Mark K. Ledbetter Norou diawara Bryan E. Porter Mathematics and Statistics Department Old Dominion University Norfolk VA USA Department of Psychology Old Dominion University Norfolk VA USA

Problem: Several approaches to analyze survey data have been proposed in the literature. One method that is not popular in survey research methodology is the use of item response theory (IRT). Since accurate methods to make prediction behaviors are based upon observed data, the design model must overcome computation challenges, but also consideration towards calibration and proficiency estimation. The IRT model deems to be offered those latter options. We review that model and apply it to an observational survey data. We then compare the findings with the more popular weighted logistic regression. Method: Apply IRT model to the observed data from 136 sites within the Commonwealth of Virginia over five years collected in a two stage systematic stratified proportional to size sampling plan. Results: A relationship within data is found and is confirmed using the weighted logistic regression model selection. Practical Application: The IRT method may allow simplicity and better fit in the prediction within complex methodology: the model provides tools for survey analysis.

关键词： Item Response Theory Logistic Regression Sampling Weight

Water Scarcity in Conakry, Guinea: Challenges and Proposed Strategies for a Way Forward

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Journal of Water Resource and Protection 2024年第4期16卷 264-280页

作者： Bernard Lassimo diawara Gerald D. S. Quoie Jr Zhuo Li Justin Junior Loua College of Environmental Science and Engineering Tongji University Shanghai China UNEP-Tongji Institute of Environment for Sustainable Development Tongji University Shanghai China State Key Laboratory of Pollution Control and Resources Reuse Tongji University Shanghai China Business School Sichuan University Chengdu China

The capital of Guinea, Conakry, faces a notable difficulty due to a water shortage, which is worsened by the rapid increase in population and urban development. The Guinean Water Company (SEG) faces challenges in supplying water to the entire city due to its limited area of approximately 420 km2 and a population of 2 million. Moreover, the population growth rate is anticipated to increase dramatically, exacerbating the difficulty of fulfilling future water requirements. As a result, this study employs data from the Knoema website and the Institute of National Statistics of Guinea (INS) to examine the water production and distribution process by the SEG. The study examines the challenges related to water scarcity in Conakry and suggests strategies to assist the city in managing the present circumstances and planning for the future. The primary objective is to get a long-lasting water supply and uphold water quality to advance public health.

关键词： Water Scarcity Conakry Population Growth SDGs SEG

Pachymeningeal en Plaque Tuberculoma in Children: A Case Report

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Open Journal of Modern Neurosurgery 2020年第1期10卷 63-69页

作者： Ibrahima Berete Alpha Boubacar Bah Seylan diawara Mohammed Benzagmout Khalid Chakour Mohammed Faiz Chaoui Service de Neurochirurgie CHU Hassan II Fès Morocco Service de Neurochirurgie CHU Donka Conakry Guinea

Pachymeningeal en plaque tuberculoma is a rare manifestation of tuberculosis and has a poor prognosis if not diagnosed early and treated adequately. The aim of the present paper is to collect the reported clinical and radiological signs in the literature and compare it with a personal observation to evaluate the possibility of a presumptive diagnosis. A 4-year-old boy presented at the pediatric emergency department with 7 days history of severe headache, vomiting blurred vision and had one partial seizure. His neurologic examination was notable for decreased visual acuity with bilateral papilledema and intact extra-ocular muscles. His neck was rigid. Neuroimaging revealed a multifocal dural-based mass on the fronto-parietal convexity with dense heterogeneous contrast enhancement and hydrocephalus. He has undergone a Ventriculoperitoneal shunt and surgical excision of the mass the next day. Outcome was favorable with antituberculosis therapy and corticosteroids. The clinical presentation and outcome were similar to the reported cases in the literature.

关键词： Tuberculoma Pachymeningeal Intracranial Tuberculosis MRI CT Scan

Assessment of Regional Climate Models over Côte D'Ivoire and Analysis of Future Projections over West Africa

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Atmospheric and Climate Sciences 2015年第2期5卷 63-81页

作者： Kouakou Kouadio abdourahamane Konare Adama diawara Bernard Kouakou Dje Vincent Olanrewaju Ajayi Arona Diedhiou Laboratoire de Physique de l’Atmosphère et Mécanique de Fluide (LAPA-MF) Université Felix Houphou&#235t-Boigny Abidjan C&#244te d’Ivoire Laboratoire de Physique de l’Atmosphère et Mécanique de Fluide (LAPA-MF) Université Felix Houphou&#235t-Boigny Abidjan d’Ivoire Société d’exploitation et développement Aéroportuaire et Météorologique Abidjan C&#244te d’Ivoire WASCAL Graduate Research Program on West African Climate System (GRP-WACS) Federal University of Technology Akure (FUTA) Akure Nigeria LTHE-IRD Université de Grenoble Grenoble France

The ability of six Regional Climate Models (RCMs) used in AMMA-ENSEMBLES project is assessed over six meteorological stations in Côte d’Ivoire. The ensemble mean of the models is also used for the prediction of climate change over West Africa. The study focused on two periods: the period 1995-2005, the present-day simulations, is used to evaluate the skills of the models over the country and the years 2010-2013, for assessment of the future climate change scenario used. The results show that the skills of the models vary from one station to another and from one season to another. None of the models considered, presents an excellent performance over the entire country and in all the seasons. Generally, the ensemble mean of all the models presents better results when compared with the observation. These results suggest that the choice of any model for study over the country may depend on the focus of interest: intensity or variability of the rain and also on area of interest. The projection for 2020-2040, future climate change over West Africa shows that the Sahel exhibits a tendency to be drier while wetter Guinean coast is observed.

关键词： AMMA Ensembles West Africa Monsoon Regional Climate Models Precipitation

Performance of Nanofiltration (NF) and Low Pressure Reverse Osmosis (LPRO) Membranes in the Removal of Fluorine and Salinity from Brackish Drinking Water

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Journal of Water Resource and Protection 2011年第12期3卷 912-917页

作者： Courfia K. diawara Saidou N. Diop Mouhamadou A. Diallo Michel Farcy André Deratani 不详

Certain areas in Senegal have a serious problem of high fluoride and salinity in underground water because of soil properties. This water currently used for drink has a bad taste on consumption and caused diseases like dental fluorosis and skeletal fluorosis. A membrane filtration plant constructed by Pall Corporation was improved through nanofiltration (NF) and Low Pressure Reverse Osmosis (LPRO). Both NF and LPRO membranes were shown applicable for salinity and fluoride ions removal from brackish and high fluorinated drinking water in a remote community. The NF membrane has given a fluorine retention rate varying between 63.3% and 71% while the LPRO membrane allow to reach 97 to 98.9% for fluorine rejection. Highest salinity rejection rates expressed through conductivity measurements are around 46% and 97% for respectively NF and LPRO.

关键词： Desalination and Brackish Water Fluorine Nanofiltration Reverse Osmosis

Understanding the Split Characteristics of the Tropical Mesoscale Convective System (MCS) of April 9, 2018, in Northern Ghana Using Infrasound Data

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Atmospheric and Climate Sciences 2021年第1期11卷 1-10页

作者： K. Benjamin Kouassi Fidele Yoroba Uchenna Onwuhaka Madu Adama diawara Kouakou Kouadio Paul Antoine Yao Laboratoire des Sciences de la Matière de l’Environnement et de l’Energie Solaire (LASMES) UFR-SSMT University FHB Abidjan C&ocirc te d’Ivoire Station Geophysique de Lamto N’Douci Cote d’Ivoire Nigeria Atomic Energy Commission Abuja Nigeria

The split characteristics of the tropical Mesoscale Convective System (MCS) of April 9, 2018, in northern Ghana were studied using infrasound data measured by the mobile array (I68CI) which was deployed by C?te d’Ivoire National Data Center (NDC) in collaboration with the Comprehensive Nuclear-Test-Ban Treaty (CTBT). These infrasound measurements were made during a measurement campaign from January 1st, 2018 to December 31, 2018, in northeast Cote d’Ivoire, precisely in Comoe National Park. Graphic Progressive Multi-Channel Correlation (GPMCC) method based on a progressive study of the correlation functions was used to analyze and visualize data. The infrasound detection from this MCS shows clearly a division of the MCS structure into 2 distinct subsystems under the effect of internal and external constraints not well known but related to convection;a smaller subsystem in the north, associated with an area of intense rainfall of about 30 mm/hour and located at 9.5°N - 2°E with an azimuth of 70° and, a large subsystem in the south, associated with a zone of high rainfall of about 96 mm/hour and located at 8.8°N - 1.4°E with an azimuth of 90°. These two subsystems were located 200 km and 260 km from the I68CI station with frequencies of 2.3 Hz and 1 Hz respectively. The mesoscale convective systems in this region are moving from East to West and including several storm cells.

关键词： Infrasound Mesoscale Convective Systems (MCS) Cote D’Ivoire Satellite Image